Optical element



FIG. 1 is a front view of an optical element showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof; the bottom being a mirror image thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 1;

FIG. 7 is a perspective view as seen from the front side; and,

FIG. 8 is a perspective view as seen from the rear side. 

CLAIM The ornamental design for an optical element, as shown and described. 